baldwin



(No Model.) 2 sheetssheet 1.

P. Vs. BALDWIN.

CEMENT 0R MORTAR MIXER.

N0. 451,992. Pazenzedy May 12, 1891.

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(No Model.)

F. S. BALDWIN. CEMENT 0E MOETAE MIXEE.

No. 451,992. Patented May 12, 1891.

Witnesses:

UNITED STATES i' ATENT Futon.

FRANK S. BALDIVIN, OF NEVARK, NEY JERSEY, ASSIGNOR OF ONE-HALF TO R.NAPIER ANDERSON, OF NEV YORK, N. Y.

CEMENT OR lVIORTAR MIXER.

SPECIFICATION forming part of Letters Patent No. 451,992, dated May 12,1891.

Application filed August 4, 1890. Serial No. 360,978. (No model.)

invention, such as will enable others skilled in the art to which itpertains to make and ro use it, reference being had to the accompanyingdrawings, which form part of. this specification. j

My invention relates to an improvement in cement or mortar mixers; andit consists in the combination and arrangement of parts, which will befully described hereinafter. 'e LThe object of my invention is toproduce a machine by means of which the cement or lime is mixed withsand in certain regulated 2o quantities, and then this mixture is fedinto arevolving open-ended cylinder, where a suitable quantity of wateris added to the mixture, and from which cylinder the mortar isdischarged ready for use. Figure l is a plan view of a machine whichembodies my invention, the upper portion of the cylinderbeing cutaway.Fig. 2is an end view of the mixer, the hopper being removed. Fig. 3 is alongitudinal vertical view taken through the hopper in the end of thecylinder. Fig. 4 is a vertical cross-section taken through the hopper.

A represents two ground sills or timbers, to which two end plates orcastings B are se- 3 5 cured. These end plates maybe of the shape shownin Fig. 2 or any other form that may be desired, and are secured rigidlytogether by the rods C. J ournaled upon suitable bearings which extendfrom the inner sides of these end plates are grooved rollers D, whichare arranged in a semicircle, as shown, and which serve to support theopen-en'ded cylinder E in position. This cylinder E is of any suitablesize and length and is provided with flanges F at its ends to catch inthe grooves in the rollers D, and thus the cylinder is enabled torevolve freely around upon the rollers D at the same time that it isheld in position by the flanges F. Secured to the center of the cylinderis the curved rack G,

which extends entirely around the outer side of the cylinder and withwhich the pinion I-I upon the shaft I engages, so that when the shaft Iis caused to revolve, either by the pulley J or the hand-cranks K on itsends, the cylinder is made to revolve while the mortar is being mixed init.

J ournaled in suitable boxes upon the castings B, and extending entirelythrough the cylinder E from end to end, is the shaft L, 6o which islocated to one side of the center of the cylinder, as shown in Fig. 2,and to which the propeller-blades M are spirally secured, and which asthey revolve force the mortar out of the cylinder at the farther endfrom the hopper. If the cylinder E is placed at an inclination, themortar can be caused to move more rapidly outI of the cylinder than whenthe cylinder is placed in a horizontal position. Upon one end of thisshaft is placedasprock- 7o et-Wheel N, around which passes thedrivingchain O from a sprocket-wheel P upon the shaft I. lVhen the shaftI is caused to revolve, the cylinder is caused to revolve in onedirection and the shaft L and blades M in the opposite` one at adifferent rate of speed. The revolution of the cylinder E has a constanttendency to carry upward the mortar, while the blades M, revolving inthe opposite direction, force it backward toward 8o the bottom of thecylinder, the blades being just long enough to about just touch thesides of the cylinder, as shown in Fig. 2. Extending into or through thecylinder is a perforatedwater-pipe Q, through which water is forced fromany suitable source upon the mixture in the cylinder and in justsufficient quantity to convert it into mortar. Inside of this cylinderabove the point Where the blades M act upon the mixture is placed ascraper R, as shown in Fig. 2, and which serves to prevent any of 'themixture from adhering to the inside of the cylinder and being carried onup around.

It will be seen from the above that the cylinder E is supported entirelyupon the rollers D and is caused to revolve in one direction,

while the shaft L and blades M are caused to revolve in the oppositeone, and that the blades touch or nearly touch the cylinder at roo oneside of its bottom for the purpose of preventing the revolution of thecylinder :from carrying up and around any of the mortar that is `beingmixed. Located at one end of the machine is the hopperS, which isdivided by a vertical partition T into two compartments, one of which islarger than the other.

In the small compartment is to be placed the lime or cement and in thelargerone is placed io the sand. The shaft Ii extends entirely throughthe bottom of this hopper S and has secured to it a number of blades Il,which form chambers or buckets, which are filled or partially filled, asthe shaft and the buckets U are made to revolve, with the lime orcement. The bottom of the hopper under the smaller chamber is formed ofa segment V, which serves to prevent any f the lime or cement fromfalling down in the hopper bezo low a certain point, and the amount oflime or cement which is allowed to drop into the buckets or chambersupon the shaft is regulated by the sliding cover XV, which moves in aline with the shaft, as shown in Fig. 3. This z5 cover lV is providedwith a fiange X upon one side, which is made to overlap the slide Y,which is forced through a slot in one side of the hopper, and whichregulates the amount of sand that shall be fed into the inclined 3obottom Z of the hopper. Thefarther the slide lV is forced into thehopper the shorter are the buckets, pockets, or chambers which are to befilled by the cement or lime and which are filled first because thechambers or pockets are caused to revolve so that they move underlthesmaller chamber of the hopper first.

As the shaft is caused to revolve, bringing the chambers filled withlime or cement under the partition T and through the larger chamber 4ofilled with sand, the frictiona'l contact of the buckets or chambersupon the sand causes a regulated amount of sand to be fed through theslot A into the inclined bottom Z of the hopper, from which the mixtureof the cement Aor lilne and the sand fall into one end of the revolvingcylinder E. The slide Y regulates the width of the slot A', and thusregulates the amount of sand which is to be mixed with the lime orcement. The flange X upon the 5o slide or cover W, by catching over thetop of the slide Y, prevents any sand from being fed through the slot Abeyond the inner end of the slide. It is only necessary to place thelime or cement into the smaller chamber of the hopper and the sand inthe larger one, and then when the machine is set in motion a regulatedamount of cement or lime is fed into the revolving cylinder, where theyhave Water added to them and are then mixed so 6o as to form a mortarofanydesired consistency,

which is discharged from the end of the cylinder Il, .ready for use.

It is obvious that by substituting gearwheels for the sprocket-wheelsand chain the inner cylinder can be driven in the same direction as theouter one. In this case the twist of the revolving blades would bereversed and their relative motion increased, allowing the material tofall back from the scraper by gravity against the revolving blades.\Vhi1e this method requires more power to operate, it may be used toadvantage under some conditions, therefore I do not confine myself toone direction of movement.

Having thus described my invention, I claim- 1. In a mortar-mixer, thecombinatiomwith a frame, of grooved rollers journaled therein at eachside ofk its center, an open-ended horizontal cylinder having annularflanges which engage the grooved rollers, ahopper at one end thereofhavin g two compartments, a shaft below the hopper having a series ofpockets to receive the material therein, astirrer within the cylinder, apipe for admitting water, and mechanism for revolving the cylinder, thestirrer, and the shaft having pockets, substantially as described.

2. In a mortar-mixer, the combination, with a horizontal revolvingcylinder, a hopper at one end of the cylinder, a shaft which passesthrough the cylinder and under the hopper, stirring devices secured tothe said shaft within the cylinder, and buckets upon the shaft below thehopper, of a chute below the shaft and hopper for delivering thematerial into the cylinder, a pipe for admitting Water, and means forrevolving the cylinder andthe shaft, substantially as shown.

In amortar-mixer, the combination, with a frame having rollers journaledin each end thereof in a circular line, of a horizontal cylinder restingupon the rollers,circular cogs upon TOO the cylinder, a hopper at oneend of the cylinder, a shaft passing through the cylinder and below thehopper carrying stirring devices and buckets for the purpose described,a shaft journaled outside of the cylinder parallel therewith, agear-wheel upon the shaft engaging the circular gear upon the cylinder,and connecting gearing between the two named shafts, combined to operatein the manner substantially as shown and described.

In testimony whereof I affix my signaturein presence of two witnesses.

FRANK S. BALDWIN. Witnesses:

OSCAR KEEN, JOHN R. I-IARDIN.

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